コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
機種説明
| モデルパーツ | 説明 |
| NXMLE | CHINT Kunlun Series Residual Current Operated サーキットブレーカー (MCCB with earth leakage protection) |
| 630 | Frame rating current 630A |
| S | Breaking capacity class S (25kA at AC400V/415V, ultimate breaking capacity 50kA) |
| 4300あ | 4P (三相4線式, 3P+N), thermal-magnetic trip unit, standard version without accessories |
| 630あ | Rated operational current 630A |
- 主要なパラメータ
| パラメータのカテゴリ | 価値 | 注意事項 |
| 基本パラメータ | ||
| タイプ | Moulded Case Circuit Breaker with Earth Leakage Protection (Residual Current Circuit Breaker) | Provides overload, 短絡および漏電保護 |
| 極 | 4P (3P+N) | Three phases + 中性 |
| 旅行タイプ | 熱磁気 (Curve C) | For power distribution protection |
| 定格絶縁電圧Ui | 800Vと | |
| Rated operational voltage Ue | 400V/415V AC (4P) | |
| Rated frequency | 50/60Hz | |
| Current Parameters | ||
| Frame current Inm | 630あ | |
| Rated current In | 630あ | |
| Residual operating current Iﾎ馬 | 100/200/300mA adjustable | Selectable per requirements |
| Residual current tripping time | 0.3s (標準) | Fast personal safety protection |
| 遮断容量 | ||
| Rated service breaking capacity Ics | 25の (AC400V) | クラスS |
| Ultimate short-circuit breaking capacity Icu | 50の (AC400V) | |
| 保護機能 | Long-time overload, short-time delay, instantaneous short-circuit, earth leakage protection | Full protection for circuits and equipment |
- 取付寸法
| Mounting Type | 寸法 (幅×高さ×奥行き, mm) | 注意事項 |
| 修理済み (front/rear connection) | 280×280×100 | Standard 4P dimensions |
| Plug-in type | 280×280×120 | Including plug-in base |
| Mounting mode | 修理済み / Plug-in | |
| Connection type | Front / Rear connection | Rear connection requires special kit |
| Terminal size | M12 hex socket screw | For large cross-section cables |
- アプリケーション
- Low-voltage distribution systems: Main or branch protection for three-phase four-wire circuits up to 630A
- Industrial equipment protection: Protect motors, transformers and other electrical devices against overload, short-circuit and earth leakage
- Building electrical: Main and sub-distribution boards in commercial buildings and industrial plants
- Personal safety: Indirect contact protection against fatal electric shock
- Electrical fire prevention: Protection against earth fault current induced electrical fires
- Operating Notes
- Ambient conditions:
周囲温度: -25℃ ~ 70℃
高度: ≤ 2000m (derate if exceeded)
湿度: ≤ 95% (non-condensing)
Avoid flammable, explosive or highly corrosive environments
- Wiring requirements:
Strictly separate N line and phase lines; N line must pass through the leakage detection transformer
Terminals must be securely tightened to avoid overheating
Cable cross-section suitable for 630A (≥ 185mm² copper recommended)
- Selection matching:
Residual current: 300mA for general distribution, 30mA for personal protection (special model)
Breaking capacity must match system short-circuit current; Class S suitable for general industry
- メンテナンス:
Test monthly using the test button
Regularly check terminals for overheating
Keep clean to ensure heat dissipation
- トラブルシューティング
| 症状 | 考えられる原因 | ソリューション |
| Trips immediately after closing | 1. Short circuit | 1. Locate short circuit |
| 2. Residual current too low | 2. Adjust to suitable Iﾎ馬 | |
| 3. Trip unit fault | 3. Replace trip unit | |
| Fails to trip on overload | 1. Thermal trip failure | 1. Replace thermal trip |
| 2. Over-current setting too high | 2. Reset current setting | |
| Fails to trip on earth leakage | 1. Leakage module fault | 1. Replace leakage module |
| 2. N line not through CT | 2. Rewire correctly | |
| 3. Test button fault | 3. Replace test button | |
| Excessive heating during operation | 1. Loose connections | 1. 端子を締める |
| 2. 過負荷 | 2. Reduce load | |
| 3. Poor ventilation | 3. Improve cooling |
- Brand Alternatives
| ブランド | 代替モデル | 互換性 |
| シュナイダー | NSX630S TM630D 4P 3D (with Vigi module) | Same breaking capacity and rated current, similar dimensions |
| ABB | Tmax T6H630 PR221DS-LSI R630 4P (with RC221) | Matching protection, separate leakage module required |
| シーメンス | 3VL630N630 4P (with 30mA leakage add-on) | Same frame and rated current, compatible mounting |
| 美味しい | CDM3L-630S/4300A-630A | Direct Chinese alternative, identical dimensions and parameters |
| 常熟スイッチ | CM3L-630S/4300A-630A | Matching technical data, compatible mounting |
- まとめ
CHINT NXMLE‑630S/4300A‑630A is a high-performance 4P earth leakage MCCB for 630A three‑phase four‑wire distribution systems. 過負荷が発生します, short‑circuit and earth leakage protection, with Class S breaking capacity suitable for general industrial applications. Its thermal‑magnetic trip (Curve C) is ideal for distribution, effectively protecting equipment and personnel. Correct selection of residual current and proper installation are essential; regular maintenance ensures long service life and reliable protection.
CHINT NXMLE-630S/4300A-630A Mounting Dimensions
- Overall Mounting Dimensions
Mounting dimensions vary slightly by installation type. Official standard values:
| Mounting Type | 全体の寸法 (幅×高さ×奥行き, mm) | Panel Cutout (mm) | 注意事項 |
| 修理済み (front/rear) | 280×280×100 | 245×245 (bolt centers) | Standard 4P, front/rear fixed same |
| Plug-in | 280×280×120 | 245×245 (base centers) | Includes base depth |
| Rear connection (特別) | 280×280×100 | 245×245 | Requires rear connection kit |
- Key Dimension Details
- 幅 (W): 280mm – Standard 4P MCCB width, compatible with mainstream switchgear
- 身長 (H): 280mm – Including operating handle, consistent with Kunlun 630A frame
- 深さ (D):
固定式: 100mm
Plug-in type: 120mm (body + ベース)
- Mounting bolts: M12 hex socket for high-current 630A application
- 取付板厚: ≥ 6mm recommended for strength and cooling
- Minimum clearances: ≥25mm left/right, ≥50mm top/bottom for operation and ventilation
- 取付方法
- Fixed mounting: Most common, bolted directly to panel; front or rear connection
- Plug-in mounting: Uses dedicated base for fast replacement, suitable for frequent maintenance
- Rear connection: Terminals on rear side, saves front panel space and improves layout
- インストールに関する注意事項
Install vertically or horizontally, tilt angle ≤ 15°
Correctly separate N and phase lines; N must pass through leakage transformer
Check and tighten all terminals after installation
Allow sufficient ventilation to prevent overheating
